rtc: rp5c01: add NVRAM support
rtc: rp5c01: add NVRAM support

The Ricoh RP5C01 RTC contains 26 x 4 bits of NVRAM.  Provide access to it
via a sysfs "nvram" attribute file.

Signed-off-by: Geert Uytterhoeven <0da414d9d963da4039c2a0525b1844228075aa58@linux-m68k.org>
Cc: Wan ZongShun <7d90017055ae88f9b614c1a99b7a29176cffa725@gmail.com>
Cc: Alessandro Zummo <f0b9bd96bf07bfecc189c62159960134588fafe5@towertech.it>
Signed-off-by: Andrew Morton <5c1e68b099950c134891f0b6e179498a8ebe9cf9@linux-foundation.org>
Signed-off-by: Linus Torvalds <69652caca27c8b940640ad396ab71f93cacec34f@linux-foundation.org>

KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs